DK157107B - ROAD FITTING WITH A SWINGING STRING - Google Patents
ROAD FITTING WITH A SWINGING STRING Download PDFInfo
- Publication number
- DK157107B DK157107B DK267081AA DK267081A DK157107B DK 157107 B DK157107 B DK 157107B DK 267081A A DK267081A A DK 267081AA DK 267081 A DK267081 A DK 267081A DK 157107 B DK157107 B DK 157107B
- Authority
- DK
- Denmark
- Prior art keywords
- string
- swinging
- frequency
- vertical load
- transverse
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/16—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of frequency of oscillations of the body
- G01G3/165—Constructional details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S177/00—Weighing scales
- Y10S177/05—Magnets
Description
DK 157107 BDK 157107 B
- 1 -- 1 -
Opfindelsen angâr en vejeindretning med en svingende streng, som har et af tværled dannet parallelf0ringssystem for et lastbord, og hvor strengen er fastgjort pâ en lodret lastbserende del af parallelogrammet og ophasngt i en tværbjælke, og hvor flere magnetsystemer med vekslende 5 polaritet anslâr den svingende streng til svingninger med h0jere fre-kvenser end strengens egenfrekvens.BACKGROUND OF THE INVENTION The present invention relates to a weighing device having a swinging string having a transverse parallel guiding system for a loading table, wherein the string is fixed to a vertical load bearing part of the parallelogram and suspended in a transverse beam and wherein several alternating magnetic polarity systems strike the swinging string for oscillations with higher frequencies than the string's own frequency.
Der kendes vejeindretninger med faste mâlelegemer, hvis egenfre-kvens aendres ved belastning. Der anvendes fortrinsvis to strenge (DE-offentligg0relsesskrxft 20.37.392, 25.19.727, samt DE-patentskrift 10 17.74.725, 17.74.739, 25.31.672). Disse er fastgjort til et stel, hvor- hos der afhængigt af konstruktionen skelnes mellem to indbyrdes uafhæn-gigt belastede svingende strenge og to ved hjælp af den last, som skal mâles, og af en referencelast ensartet forspændte strenge.Weighing devices with fixed measuring bodies are known whose self-frequency is changed by load. Preferably, two strings are used (DE Publication No. 20.37.392, 25.19.727, and DE Patent Nos. 17,74,725, 17,74,739, 25,311,672). These are attached to a frame whereby, depending on the design, two mutually independent swinging strings are distinguished and two by means of the load to be measured and by a reference load uniformly biased strings.
Strengene f0res mellem magnetpoler og bringes til at svinge med 15 deres egenf rekvens ved hjælp af en str0m, som sendes gennem dem. I af-hængighed af den pâf0rte vægt ændres frekvenserne for de svingende strenge. Vejeresultatet beregnes ud fra disse frekvensændringer. Sâdan-ne vejeindretninger, som drives med flere strenge, beh0ver et st0rre aggregatopbud, fx. for hver streng en frekvenstæller, komparatorer og 20 differenstællere, der altsammen kan mindskes ved anvendelse af en streng.The strings are passed between magnetic poles and caused to oscillate at their own frequency by a current sent through them. Depending on the weight applied, the frequencies of the swinging strings change. The weighing result is calculated from these frequency changes. Such weighing devices, which are operated with multiple strings, need a larger aggregate supply, e.g. for each string, a frequency counter, comparators and 20 differential counters, all of which can be reduced by using a string.
Strengvægte med kun ên streng er ligeledes kendt. Ved sâdanne ap-parater skal pâvirkninger fra omgivelserne, sâsom temperatursvingninger og rystelser, som kan hâve indflydelse pâ mâleresultaterne, udelukkes.String weights with only one strand are also known. In such devices, effects from the environment, such as temperature fluctuations and vibrations that may have an impact on the measurement results, must be excluded.
25 Med henblik pâ dæmpningen af det stive mâlesystem med relativt h0j re-sonansfrekvens for strengen er det fra DE-offentligg0relsesskrift 27.32.052 kendt at koble magnetsystemer med den indretning, som optager lasten. Ligeledes kobles der et magnetsystem til mâlestrengen for at udelukke temperaturindflydelser, som det fremgâr af DE-offentligg0rel-30 sesskrift 22.46.500.25 For the purpose of attenuating the rigid measuring system with relatively high resonant frequency for the string, it is known from DE Publication No. 27.32.052 to couple magnetic systems with the device which receives the load. Likewise, a magnetic system is coupled to the measuring string to exclude temperature influences, as evidenced by DE Publication No. 22.46,500.
Endvidere angiver US-patentskrift 39.63.082 en kraftmiler, som anslâr en forspændt streng til tværsvingninger ved hjælp af elektriske organer, og som har et parallelf0ringssystem, som er dannet af tværled.In addition, U.S. Pat. No. 39,63,082 discloses a power miller which estimates a prestressed string for transverse oscillations by means of electrical means and which has a parallel routing system formed by transverse links.
Denne indretning angiver lige som PR-patentskrift 1.380.257 med en 35 svingende streng, som anslâs til svingninger med h0jere frekvens end - 2 -This device, just like PR patent specification 1,380,257, has a 35 swinging string, which is estimated for higher frequency vibrations than - 2 -
DK 15 710 7 BDK 15 710 7 B
strengens egenfrekvens af flere permamagneter med vekslende polaritet/ ingen tilstrækkelige midler til fjernelse af temperaturindflydelse og pâvirkning fra ydre rystelser.the string's own frequency of multiple alternating polarity magnets / no adequate means to remove temperature influence and influence from external shaking.
Til grand for opfindelsen ligger den opgave at tilvejebringe en 5 vejeindretning med en svingende streng, som i et stort orarâde er tempe-raturuafhængig, og som er tilstrækkeligt dæmpet mod rystelser. Demie opgave 10ses if01ge opfindelsen ved, at den lodrette lastbærende del, som rummer magnetsystemet og holder strengen, samt tværbjælken, som holder strengen, er udstyret med hulrum, som er fyldt med svingnings-10 dæmpende materiale. Med anvendelsen af svingningsdæmpende materiale til opfyldning af hulrummene bevirkes ser efter mâlingen er hurtig afkling-ning af svingningen, og dermed sikres en hurtig stilstand af vægten. Desuden ctempes oversvingninger, som ville kunne pâvirke mâleresultatet.The object of the invention is to provide a weighing device with a swinging string which, in a large order, is temperature independent and which is sufficiently damped against shaking. According to the invention, this task is characterized in that the vertical load-carrying part which holds the magnetic system and holds the string, as well as the transverse beam which holds the string, is equipped with cavities filled with vibration-damping material. With the use of anti-vibration material to fill the voids, looks after the measurement is rapid decay of the oscillation, thus ensuring a rapid standstill of the weight. In addition, fluctuations are curbed which could affect the measurement result.
Opfindelsen forklares i det f01gende nasrmere ved hjælp af tegnin-15 gen, som bestâr af fire figurer. Pâ tegningen viser fig. 1 et skematisk snit gennem vægten set fra siden, fig. 2 vægten set skematisk fra oven med fjernet lastbord, fig. 3 en skematisk opstalt af den lodrette lastbærende del af 20 parallellogrammet, og fig. 4 den lodrette lastbærende del if0lge fig. 3 set fra siden med strengens svingningsform.The invention is explained in the following by means of the drawing, which consists of four figures. In the drawing, FIG. 1 is a schematic side view of the weight; FIG. 2 is a schematic top view of the removed loading table; FIG. 3 is a schematic elevation of the vertical load carrying portion of the parallelogram; and FIG. 4 shows the vertical load carrying part according to FIG. 3 is a side view of the shape of the string.
Pâ aile figurer har de samme udformninger eller komponenter de 25 samme henvisningsbetegnelser.In all figures, the same designs or components have the same reference numerals.
Vægten bestâr af en yderkasse 10 med forstærkninger 11 i hj0merne og ikke viste noter til kredsl0bskortene i de elektroniske udnyttelses-og visningsindretninger.The weight consists of an outer box 10 with reinforcements 11 in the casing and not shown notes for the circuit boards of the electronic utilization and display devices.
Tværleddene 12 udg0r et parallelf0ringssystem for den lodrette 30 lastbærende del 20. De er udstyret med indslebne riller for at opnâ en passende elasticitet.The cross members 12 constitute a parallel guide system for the vertical 30 load-bearing part 20. They are provided with cut grooves to obtain a suitable elasticity.
Den lodrette lastbærende del 20 tjener til optagelse af lastbordet 30 og til ophængning af strengen 21's ene ende. Med henblik pâ sving-ningsdæmpning er den lodrette lastbærende del 20 forsynet med en indre 35 dæmpning. Til dette formâl er et hulrum 22 i den lodrette lastbærende - 3 -The vertical load carrying portion 20 serves to receive the loading table 30 and to suspend one end of the string 21. For the purpose of oscillation damping, the vertical load carrying part 20 is provided with an internal damping. For this purpose, a cavity 22 in the vertical load bearing - 3 -
DK 157107 BDK 157107 B
del 20 fyldt med et svingningsdæmpende materiale, fx. en prop af form-stof. Den del af den lodrette lastbærende del 20, som vender mod stren-gen 21, bærer fire magnetsystemer 23. Strengen 21 er trukket mellem disse fire magnetsystemer. Pâ den nederste ende af den lodrette lastbæ-5 rende del 20 er der anbragt spændekæber 25, 26, som fastholder strengen 21 ved dens nederste ende.part 20 filled with an anti-vibration material, e.g. a plug of molding material. The portion of the vertical load carrying portion 20 facing the string 21 carries four magnetic systems 23. The string 21 is drawn between these four magnetic systems. On the lower end of the vertical load-carrying part 20, clamping jaws 25, 26 are provided which hold the string 21 at its lower end.
Vægtens yderkasse 10 har pâ to modstâende steder ribber 14, som tjener til optagelse af en husfast, elektrisk isoleret ophængt tvær-bjælke 40. Denne tværbjælke 40 er ophængt vinkelret pâ den lodrette 10 lastbærende del 20 og anbragt parallelt med de j. tværleddene 12 ind-slebne ri lier 13. Ligesom ved den lodrette lastbærende del 20 er et hulrum 43 i tværbjælken 40 fyldt med et svingningsdaempende materiale. Tværbjælken 40 bærer to spændekæber 41, 42, som optager den 0vre ende af strengen 21.The outer box 10 of the weight has in two opposite locations ribs 14 which serve to receive a housing-fixed, electrically insulated suspended cross-beam 40. This cross-beam 40 is suspended perpendicular to the vertical 10 load-bearing part 20 and arranged parallel to the j. The transverse links 12 are engaged in grooves 13. As with the vertical load-bearing part 20, a cavity 43 in the transverse beam 40 is filled with a vibration-damping material. The crossbeam 40 carries two clamping jaws 41, 42 which receive the upper end of the string 21.
15 Endvidere tjener tværbjælken 40 som anslag for en indstillelig skrue 31 pâ lastbordet 30 som overbelastningsbeskyttelse.In addition, the crossbeam 40 serves as a stop for an adjustable screw 31 on the loading table 30 as overload protection.
Strengen 21 udg0r en del af en elektrisk brokobling, som ikke er vist. Ved indkobling af str0mkredsen udb0jes strengen 21 svarende til magnetpolingerne af permamagneterne 23 og svinger transversalt med sin 20 egenfrekvens. Ved vægten af lasten ændres frekvensen, som altsâ udg0r et mâl for belastningen. Ved udformningen med fire svingningsbuge med anvendelse af fire magnetsystemer opnâs der en h0jere mâlefrekvens end strengens egenfrekvens, som medf0rer en kortere mâletid, en mere n0jag-tig mâling samt en mindre f01somhed over for forstyrrende felter, fx.The string 21 forms part of an electrical bridge coupling which is not shown. When the current circuit is switched on, the string 21 is deflected corresponding to the magnetic poles of the permamagnets 23 and swings transversely at its own frequency. With the weight of the load, the frequency changes, which is a measure of the load. In the four oscillation arc design using four magnetic systems, a higher measurement frequency is obtained than the string's own frequency, which results in a shorter measurement time, a more accurate measurement and a less sensitivity to disturbing fields, e.g.
25 brumfrekvenser.25 humming frequencies.
Som materiale til strengen 21 anvendes et umagneti.sk spændebând, hvis elasticitetsmodul er konstant i et stort temperaturomrâde, og hvis udvidelse er fuldt reversibel. Fortrinsvis vælges et spændebând af den art, som anvendes til urofjedre i ure.As material for the string 21 is used an unmagnetic strap whose modulus of elasticity is constant in a large temperature range and whose expansion is fully reversible. Preferably, a strap of the kind used for watch springs in watches is selected.
3030
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3023565 | 1980-06-20 | ||
| DE3023565A DE3023565C2 (en) | 1980-06-20 | 1980-06-20 | Weighing device with a vibrating string |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK267081A DK267081A (en) | 1981-12-21 |
| DK157107B true DK157107B (en) | 1989-11-06 |
| DK157107C DK157107C (en) | 1990-04-02 |
Family
ID=6105323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK267081A DK157107C (en) | 1980-06-20 | 1981-06-18 | ROAD FITTING WITH A SWINGING STRING |
Country Status (20)
| Country | Link |
|---|---|
| US (1) | US4383585A (en) |
| AT (1) | AT385358B (en) |
| BE (1) | BE887285A (en) |
| CA (1) | CA1151681A (en) |
| CH (1) | CH649838A5 (en) |
| CS (1) | CS274256B2 (en) |
| DD (1) | DD155267A1 (en) |
| DE (1) | DE3023565C2 (en) |
| DK (1) | DK157107C (en) |
| FI (1) | FI71994C (en) |
| FR (1) | FR2485188B1 (en) |
| GB (1) | GB2078956B (en) |
| IE (1) | IE50446B1 (en) |
| IT (1) | IT1139027B (en) |
| LU (1) | LU83001A1 (en) |
| NL (1) | NL189479C (en) |
| NO (1) | NO153155C (en) |
| PL (1) | PL133489B1 (en) |
| PT (1) | PT72094B (en) |
| SE (1) | SE451035B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU545387B2 (en) * | 1982-10-05 | 1985-07-11 | Yamato Scale Company, Limited | Weight and force measuring device |
| DE19860295C2 (en) * | 1998-12-18 | 2003-04-24 | Francotyp Postalia Ag | Method and arrangement for controlling a dynamic balance |
| FR2802299B1 (en) * | 1999-12-09 | 2002-03-01 | France Etat Ponts Chaussees | VIBRATING WIRE SENSOR IN PARTICULAR FOR MEASURING DEFORMATIONS OF A STRUCTURE |
| WO2003046492A1 (en) * | 2001-11-26 | 2003-06-05 | Mark Fielker | String weight sensor |
| US7149577B2 (en) * | 2002-12-02 | 2006-12-12 | Medtronic, Inc. | Apparatus and method using ATP return cycle length for arrhythmia discrimination |
| US7073577B2 (en) * | 2003-08-29 | 2006-07-11 | Applied Geotech, Inc. | Array of wells with connected permeable zones for hydrocarbon recovery |
| US9885543B2 (en) | 2015-10-01 | 2018-02-06 | The United States Of America As Represented By The Secretary Of The Army | Mechanically-adaptive, armor link/linkage (MAAL) |
| US10670375B1 (en) | 2017-08-14 | 2020-06-02 | The United States Of America As Represented By The Secretary Of The Army | Adaptive armor system with variable-angle suspended armor elements |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1380257A (en) * | 1964-01-23 | 1964-11-27 | Oscillator | |
| US3712395A (en) * | 1970-11-16 | 1973-01-23 | Franklin Electric Co Inc | Weight sensing cell |
| US3963082A (en) * | 1971-06-23 | 1976-06-15 | Mettler Instrumente Ag | Force measuring apparatus of the vibratory string type |
| US4179004A (en) * | 1978-02-15 | 1979-12-18 | National Controls, Inc. | Force multiplying load cell |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH469973A (en) * | 1967-09-25 | 1969-03-15 | Wirth Gallo & Co | Electric mass meter |
| CH474752A (en) * | 1968-01-26 | 1969-06-30 | Wirth Gallo & Co | Electric mass meter |
| DE2037392A1 (en) * | 1970-07-28 | 1972-02-03 | Sauter Kg August | String balance |
| GB1322871A (en) * | 1971-06-23 | 1973-07-11 | Mettler Instrumente Ag | Force-measuring apparatuses |
| CH533296A (en) * | 1971-06-23 | 1973-01-31 | Mettler Instrumente Ag | Dynamometer |
| CH538683A (en) * | 1971-11-23 | 1973-06-30 | Mettler Instrumente Ag | Force or length meter |
| US4088014A (en) * | 1975-01-14 | 1978-05-09 | Wirth, Gallo & Co. | Mass and force meter |
| DE2519727B2 (en) * | 1975-05-02 | 1980-02-21 | Maatschappij Van Berkel's, Patent N.V., Rotterdam (Niederlande) | Method of operating a weighing device |
| DE2732052A1 (en) * | 1977-07-15 | 1979-02-01 | Berkel Patent Nv | Electrodynamic balance with pan suspended on oscillating string - has damping magnet in coil whose current is controlled by frequency pick=up |
| CH604149A5 (en) * | 1977-09-01 | 1978-08-31 | Wirth Gallo & Co |
-
1980
- 1980-06-20 DE DE3023565A patent/DE3023565C2/en not_active Expired
- 1980-11-19 NL NLAANVRAGE8006311,A patent/NL189479C/en not_active IP Right Cessation
- 1980-11-24 PT PT72094A patent/PT72094B/en not_active IP Right Cessation
- 1980-11-25 GB GB8037733A patent/GB2078956B/en not_active Expired
- 1980-11-28 NO NO803602A patent/NO153155C/en unknown
- 1980-12-01 FI FI803726A patent/FI71994C/en not_active IP Right Cessation
- 1980-12-01 IE IE2494/80A patent/IE50446B1/en not_active IP Right Cessation
- 1980-12-03 CH CH8918/80A patent/CH649838A5/en not_active IP Right Cessation
- 1980-12-11 DD DD80225970A patent/DD155267A1/en not_active IP Right Cessation
- 1980-12-12 LU LU83001A patent/LU83001A1/en unknown
- 1980-12-16 PL PL1980228507A patent/PL133489B1/en unknown
- 1980-12-30 AT AT0634780A patent/AT385358B/en not_active IP Right Cessation
-
1981
- 1981-01-14 CS CS27981A patent/CS274256B2/en unknown
- 1981-01-29 BE BE0/203634A patent/BE887285A/en not_active IP Right Cessation
- 1981-01-30 SE SE8100740A patent/SE451035B/en unknown
- 1981-02-26 FR FR8103886A patent/FR2485188B1/en not_active Expired
- 1981-03-12 IT IT20300/81A patent/IT1139027B/en active
- 1981-03-31 CA CA000374276A patent/CA1151681A/en not_active Expired
- 1981-05-12 US US06/262,797 patent/US4383585A/en not_active Expired - Lifetime
- 1981-06-18 DK DK267081A patent/DK157107C/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1380257A (en) * | 1964-01-23 | 1964-11-27 | Oscillator | |
| US3712395A (en) * | 1970-11-16 | 1973-01-23 | Franklin Electric Co Inc | Weight sensing cell |
| US3963082A (en) * | 1971-06-23 | 1976-06-15 | Mettler Instrumente Ag | Force measuring apparatus of the vibratory string type |
| US4179004A (en) * | 1978-02-15 | 1979-12-18 | National Controls, Inc. | Force multiplying load cell |
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| Date | Code | Title | Description |
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| PBP | Patent lapsed |